The final, flawed, result. Two buildings on separate titles, sharing walls and ceding easements to each other. How would you feel about a neighbour’s rainwater charging through plastic pipes concealed in your garage?
The resulting requirement for negotiation and concomitant liability is little different to a strata plan in effect. This disgrace took three years to brew, it reflects on the lack of competency throughout. It remains neither occupied nor re-sold.
The need for easements would have been wholly avoidable had the contractors plumbed in advance for stormwater, and used parapet walling/box gutters instead of an overhanging eave where nominal boundaries met. This requires only: Experience, common sense, a little intelligence, ability to read plans and push back against stupidity.